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Finding the Fourth Proportional to 81,471.99, 112,431.33 and 45,173.33

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Solution

The fourth proportional to 81,471.99, 112,431.33 and 45,173.33 is: 62,339.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,471.99 : 112,431.33 = 45,173.33 : x
  2. Step 2: Convert to fraction form
    81,471.99/112,431.33 = 45,173.33/x
  3. Step 3: Cross multiply
    81,471.99x = 112,431.33 × 45,173.33
  4. Step 4: Simplify right side
    81,471.99x = 5,078,897,572.43
  5. Step 5: Solve for x
    x = 5,078,897,572.43/81,471.99
  6. Step 6: Final answer
    x = 62,339.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.